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Waterborne polyurethane epoxy resin modified emulsified asphalt

A water-based polyurethane and epoxy resin technology, applied in the direction of on-site coagulation pavement, building components, building insulation materials, etc., can solve the problems of inferior asphalt, low flexibility, brittle cracking, etc., and achieve high cohesion. , Good flexibility, not easy to fall off

Active Publication Date: 2012-01-18
CHONGQING SPECIAL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the emulsified asphalt obtained in this invention has good bonding performance and high strength, and can better meet the use performance of asphalt roads compared with ordinary emulsified asphalt, it adopts bisphenol A type epoxy resin and aromatic amine curing agent , these two types of substances contain a large number of rigid benzene ring groups, the cured product is hard and brittle, and its flexibility is very low, even inferior to asphalt, so it is easy to be brittle and crack under load, resulting in new diseases

Method used

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  • Waterborne polyurethane epoxy resin modified emulsified asphalt
  • Waterborne polyurethane epoxy resin modified emulsified asphalt
  • Waterborne polyurethane epoxy resin modified emulsified asphalt

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of water-based epoxy resin curing agent

[0032] Diethylenetriamine and polypropylene glycol diglycidyl ether are in a molar ratio of 4:1, put diethylenetriamine into a four-necked flask with stirring and reflux condensation, add a small amount of sodium hydroxide, heat to 70°C, and slowly add polypropylene glycol After adding diglycidyl ether, continue to react under stirring for 3 hours, then distill off excess diethylenetriamine under reduced pressure, add hydrochloric acid and water to neutralize to pH 8.0, solid content 50%.

[0033] 2. Preparation of Waterborne Polyurethane Epoxy Resin

[0034] 2.1 Preparation of polyurethane epoxy resin

[0035] Put polyethylene glycol 80 into a dry four-necked flask with stirring and reflux condensation, heat to 80°C, vacuumize to remove moisture, fill with nitrogen for protection, slowly add hexamethylene diisocyanate, and continue to react under stirring after the addition is complete 4 hours.

[0036] Add ep...

Embodiment 2

[0047] 1. Preparation of water-based epoxy resin curing agent

[0048] Triethylenetetramine and polypropylene glycol diglycidyl ether are in a molar ratio of 4:1, put triethylenetetramine into a four-necked flask with stirring and reflux condensation, add an appropriate amount of sodium hydroxide, heat to 70 °C, and slowly add polypropylene glycol After adding diglycidyl ether, continue to react under stirring for 3 hours, then distill off excess triethylenetetramine under reduced pressure, add hydrochloric acid and water to neutralize to pH 2.0, solid content 50%.

[0049] 2. Preparation of Waterborne Polyurethane Epoxy Resin

[0050] 2.1 Preparation of polyurethane epoxy resin

[0051] Put polyethylene glycol 200 into a dry four-neck flask with stirring and reflux condensation, heat to 80°C, vacuumize to remove moisture, fill with nitrogen for protection, slowly add toluene diisocyanate, and continue to react under stirring for 4 hours after the addition is complete.

[00...

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Abstract

The invention relates to waterborne polyurethane epoxy resin modified emulsified asphalt, which comprises an ingredient A and an ingredient B, wherein the ingredient A is modified alicyclic amine epoxy resin curing agent aqueous solution, the ingredient B consists of the following ingredients in mass parts: 5 to 40 parts of waterborne polyurethane epoxy resin and 60 to 95 parts of emulsified asphalt, and the mass percent ratio of the ingredient A to an ingredient B is 1 / 10 to 1 / 30. During application, the ingredient A and the ingredient B are proportionably and uniformly mixed, and the waterborne polyurethane epoxy resin modified emulsified asphalt is obtained. Various indexes of the modified emulsified asphalt are all superior to those of the modified emulsified asphalt in common use in markets, good low-temperature flexibitity and high-temperature stability are realized, the brittle rupture is not easily caused under the loading effect, the adhesivity with stone materials and pavements is good, the binding force is strong, and the waterborne polyurethane epoxy resin modified emulsified asphalt can be used for pavement maintenance or can be used as cementing materials of preventive maintenance and pot hole repair materials.

Description

technical field [0001] The invention relates to a modified emulsified asphalt material for pavement pothole repair and preventive maintenance, in particular to an emulsified asphalt modified with water-based polyurethane epoxy resin. Background technique [0002] During the use of the pavement, there will be diseases such as falling grains, cracks and potholes. Numerous use experiences at home and abroad show that taking appropriate maintenance measures according to the degree of road surface disease can improve the service quality of the road, prolong the service life of the road and save costs. The pavement maintenance or repair technology using emulsified asphalt as cementing material has many advantages such as wide application range, convenient construction, energy saving and consumption reduction. However, the bonding strength of emulsified asphalt is low, and the effect is not ideal. The repair material is easy to drop grains, crack or delaminate under the action of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L63/00C08G59/50C08G59/28E01C7/24C04B26/26
Inventor 马志君赵可曾德亮
Owner CHONGQING SPECIAL ENG TECH
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